The dump package contains both dump and restore. Dump examines files in
a filesystem, determines which ones need to be backed up, and copies
those files to a specified disk, tape or other storage medium. The
restore command performs the inverse function of dump; it can restore a
full backup of a filesystem. Subsequent incremental backups can then be
layered on top of the full backup. Single files and directory subtrees
may also be restored from full or partial backups.